AI Brain Fry Is Real And I Felt It As a Solo Founder
Harvard Business Review and BCG describe AI brain fry. Here is what it feels like in real life when you juggle tools as a solo founder.

The Day I Realized I Was Cooked
At the end of the day, I’m cooked.
Not because I worked too hard.
Not because the problems were too complex.
But because I was juggling too many AI tools at the same time.
ChatGPT for thinking.
Claude for writing.
Perplexity for research.
Some agent running in the background.
Another tool summarizing emails.
Another one rewriting prompts.
And somewhere in between… I lost clarity.
That’s when something clicked.
Harvard Business Review Put a Name on It
Harvard Business Review recently described a phenomenon called “AI brain fry.”
In collaboration with Boston Consulting Group, they studied how people actually use AI at work.
The conclusion is uncomfortable:
AI doesn’t just reduce workload.
It can intensify it.
Especially when you're not replacing work… but managing it through AI.
That’s the key difference.
The Hidden Shift: From Doing Work to Managing Work
As a solo founder, you wear all hats.
Product.
Sales.
Marketing.
Support.
Strategy.
Now add AI to that mix.
You’re no longer just doing the work.
You’re:
- Prompting
- Reviewing
- Comparing outputs
- Switching between tools
- Validating results
- Rewriting instructions
You become a manager of machines, not a creator.
And that’s where the overload starts.
The Real Problem Isn’t AI — It’s Orchestration
The HBR and BCG research highlights something critical:
The most mentally exhausting part of AI is not using it.
It’s overseeing it.
That hits hard.
Because as a founder, you’re constantly asking:
- Is this output correct?
- Should I try another tool?
- Can I get a better result?
- Did I miss something?
That loop never stops.
And unlike human work, AI creates infinite possibilities.
Which means infinite decisions.
The Productivity Trap
Here’s the paradox:
- One AI tool → feels powerful
- Two tools → feels efficient
- Three tools → still manageable
After that?
Everything starts to break.
You don’t move faster.
You fragment your attention.
I’ve had moments where:
- I started something in one tool
- Continued in another
- Compared results in a third
- Then forgot what the original goal even was
That’s not productivity.
That’s noise.
This Is Not a Product Problem
Let me be very clear:
This is not something ReplyFabric solves.
And it shouldn’t.
Because this isn’t about email.
This isn’t about automation.
This is about how humans interact with AI.
Even the best AI products can contribute to brain fry if used the wrong way.
The Solo Founder Multiplier Effect
If you’re in a team, there’s some natural distribution:
- Someone focuses on tools
- Someone focuses on execution
- Someone makes decisions
As a solo founder?
You do all three. Simultaneously.
That’s where it becomes dangerous.
You’re not just working.
You’re:
- Thinking
- Deciding
- Validating
- Switching contexts
All at once.
No wonder your brain feels like it has 20 tabs open.
The Only Way Out
The insight is simple, but hard to apply:
AI should remove work. Not create management overhead.
That means:
- Fewer tools, not more
- Clear roles for each tool
- Less switching
- More focus
And most importantly:
Stop chasing the “perfect output.”
Because that’s where the spiral begins.
My Takeaway
AI is incredible.
But if you’re not careful, it becomes a cognitive amplifier — not a productivity one.
And as a solo founder, that amplification hits harder than anywhere else.
So yes, Harvard Business Review and Boston Consulting Group gave it a name.
But I didn’t need the study to recognize it.
I felt it.
At the end of the day…
I was cooked.
📥 Download the article: When Using AI Leads to “Brain Fry”
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About the Author
Tom Vanderbauwhede is the founder & CEO of ReplyFabric, lecturer in AI at KdG University, and a seasoned entrepreneur with 25+ years of business experience. He holds master's degrees in Applied Economics, Business Administration (MBA), and Strategic Change Management & Leadership. Tom is passionate about building AI tools that reduce email overload and help teams focus on what matters.
Connect with Tom on LinkedIn and follow his journey as a founder.